Fully adaptive MA-ABE supporting multi-fan-in circuits
Abstract
As a distributed extension of ciphertext-policy attribute-based encryption (CP-ABE), multi-authority ABE (MA-ABE) does not require the participation of a trusted central authority and has a wider application prospect in the decentralized background of the cloud computing environment. We propose the first MA-ABE scheme supporting multi-fan-in circuits and collusion-resistance on prime-order bilinear groups and prove the fully adaptive security based on the matrix decision Diffie-Hellman (MDDH) assumption. Compared with the only two fully adaptively secure MA-ABE schemes, our scheme enjoys shorter parameters, which has lower ciphertext and key size, and supports many-use of attribute.
Fields of Study & Subjects
Cryptography and Data Security
Cloud Data Security Solutions
Blockchain Technology Applications and Security
Publication details
- Journal / source
- Journal of Computer Security
- Volume
- 34
- Issue
- 3
- Pages
- 211–229
- Publication date
- 16 February 2026
- Language
- EN